Assessment of the seasonal dynamics of photosynthetic pigments in maple leaves using vegetation indices calculated from hyperspectral survey data

Abstract

The article presents the results of studies on seasonal changes in the content of photosynthetic pigments in maple leaves. As a result, time series of pigment concentrations and values of 80 vegetation indices (VI) were obtained for three growing seasons (2021-23). It was found that the time series of a large group of VI (CARI, Carter4, Datt3, DD, Maccioni, MTCI, mSR2, NDVI2, OSAVI2, REP_Li, SR6, TCARI_OSAVI, Vogelmann2, Vogelmann et al. - in total, more than 25 VI) have a well-defined seasonal dynamics, coherent with the seasonal dynamics of chlorophyll concentrations. According to the test results, the models with CORE/OS AVI as an independent variable are the best for approximating the values of the chlorophyll sum. The NDVI index proved to be ineffective as a proxy metric for chlorophyll concentration. The seasonal dynamics of chlorophyll content and values in And is species-specific. Keywords: ACER, CHLOROPHYLL, CAROTENOIDS, TIME SERIES OF VEGETATION INDICES, SEASONAL DYNAMICS